NAME

sane-teco2 - SANE backend for TECO / RELISYS scanners

DESCRIPTION

The sane-teco2 library implements a SANE (Scanner Access Now Easy)
backend that provides access to some TECO SCSI flatbed scanners. This
backend should be considered beta-quality software! TECO scanners are
sold under various brands like Mustek, Relisys, Piotech, Primax, TRUST.
This backend may or may not support yours.
The scanners that should work with this backend are:
Vendor Model TECO model status
---------------------- -------------- -----------
Mustek ScanMagic 4830S VM3575 untested
Primax Jewel 4800 VM356A good
Primax Profi 9600 VM6575 basic
Primax Profi 19200 VM6586 good
Relisys APOLLO Express 3 VM356A basic
Relisys APOLLO Express 6 VM6565 good
Relisys APOLLO Express 12 ? untested
Relisys AVEC II S3 VM3564 good
Relisys AVEC Super 3 VM3575 basic
Relisys SCORPIO Pro VM6575 good
Relisys SCORPIO Pro-S VM6586 untested
Relisys SCORPIO Super 3 VM3575 good
For all these scanners, lineart and gray mode work well. However, most
of them do not support more than a handful of resolutions in color
mode. See the backend home page (under AUTHOR) for the exact status of
each scanner.
Note that the untested scanner will not be directly supported. You
should contact the author for that.
The TECO VM number can usually be found at the back of the scanner. It
is also part of the FCC ID.
The options the backend supports can either be selected through command
line options to programs like scanimage or through GUI elements in
xscanimage, xsane, quiteinsane or kooka.
If you have any success with a scanner not listed here, or if you have
any strange behavior, please report to the backend maintainer or to the
SANE mailing list.
Valid command line options and their syntax can be listed by using
scanimage --help -d teco2
ScanMode--mode selects the basic mode of operation of the scanner valid choices
are Lineart , Gray and Color The Lineart mode is black and white
only (1 bit). Gray mode will produce 256 levels of gray (8
bits). Color will produce a 24 bits color image.
--resolution
Lineart and Gray selects the resolution for a scan. The scanner
can do all resolutions between 1 and 600, in increments of 1.
Color selects the resolution for a scan. The scanner can do only
the resolutions listed.
All values with ydpi > 300 (300 x 600) or 600 (600 x 1200)
result in a wrong proportion for the scan. The proportion can be
adjusted with the following imagemagick command: convert
-geometry (dpi/max_xdpi * 100%)x100% max_xdpi is for the vm3575
constant with 300 dpi e.g. 600dpi adjust with: convert -geometry
200%x100%
Geometryoptions-l-t-x-y
control the scan area: -l sets the top left x coordinate, -t the
top left y coordinate, -x selects the width and -y the height of
the scan area. All parameters are specified in millimeters by
default.
Enhancementoptions--custom-gamma(nocustomgammaoptionfortheVM3564andVM356A)
(color mode only) allows the user to specify a gamma table (see
the next 3 parameters).
--red-gamma-table
(color mode only) can be used to download a user defined gamma
table for the red channel. The table must be 256 bytes long.
--green-gamma-table
(color mode only) can be used to download a user defined gamma
table for the green channel. The table must be 256 bytes long.
--blue-gamma-table
(color mode only) can be used to download a user defined gamma
table for the blue channel. The table must be 256 bytes long.
--white-level-r
(VM3564, VM356A, VM3575 and VM6575 only) Selects what red
radiance level should be considered "white", when scanning some
sheets by changing the calibration value loaded into the
scanner. Scale 0..64 in steps of 1.
--white-level-g
(VM3564, VM356A, VM3575 and VM6575 only) Selects what green
radiance level should be considered "white", when scanning some
sheets by changing the calibration i value loaded into the
scanner. Scale 0..64 in steps of 1.
--white-level-b
(VM3564, VM356A, VM3575 and VM6575 only) Selects what blue
radiance level should be considered "white", when scanning some
sheets by changing the calibration value loaded into the
scanner. Scale 0..64 in steps of 1.
--preview
requests a preview scan. The resolution used for that scan is 50
dpi (for VM356A and VM6575 75 dpi) and the scan area is the
maximum allowed. The scan mode is user selected. The default is
"no".

CONFIGURATIONFILE

The configuration file /etc/sane.d/teco2.conf supports only one
information: the device name to use (eg /dev/scanner).

FILES

/usr/lib/sane/libsane-teco2.a
The static library implementing this backend.
/usr/lib/sane/libsane-teco2.so
The shared library implementing this backend (present on systems
that support dynamic loading).

ENVIRONMENT

SANE_DEBUG_TECO2
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend.
E.g., a value of 128 requests all debug output to be printed.
Smaller levels reduce verbosity.
SANE_TECO2_CAL_ALGO
Either 0 or 1. Selects the algorithm for the calibration. A
value of 1 seems to give better scans on the VM356A, VM3575.
Feedback on it is welcome. For VM3564, VM356A, VM3575, VM6575
default 1. For other supported types default 0.

LIMITATIONS

The windows TWAIN driver has many more options than this SANE backend.
However they are only software adjustments. This backend only
implements what the scanner can support.

SEEALSO

AUTHORS

CREDITS

Thanks to:
Gerard Klaver for his relentless VM3575 testings and contributed a
patch to support the VM3564 and VM356A.
Mark Plowman for providing the first SCSI traces from a VM3575.
Andreas Klaedtke for providing the first SCSI traces from a VM6586 and
for his testing, and to Stefan von Dombrowski for his testing.
Nicolas Peyresaubes for providing the first SCSI traces from a VM656A
and for his testing.
Dave Parker for testing the support for the VM6575.
Michael Hoeller for testing the support for the VM356A.
Christoph.Hoeffner for testing the support for the VM3564 (Relisys AVEC
II S3 firmware 1.09).